TLP2168(F)

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The TLP2168(F) is an opto-isolator from Toshiba that consists of a 780nm light-emitting diode (LED) and a phototransistor (PT) with a built-in logic memory circuit in a miniature surface-mountable PLP package. This device is designed to provide voltage isolation and logic signal level conversion between digital system logic and analog system logic. An opto-isolator, or an Optocoupler, is a device which is designed to send a modulated signal over an optical- electrical boundary with galvanic isolation. Opto-isolators generally consist of a light-emitting device and a light-sensing device. The TLP2168(F) is classified as an opto-isolator with a logic output and is ideal for applications where voltage isolation, noise filtration and ground-loop elimination is needed.

The TLP2168(F) opto-isolator has a maximum breakdown voltage of 5kVrms and a minimum isolation voltage of 10Vac. The expected power dissipation of the device is 540mW. The LED light source has a forward voltage of 3.3V with a forward current of 50mA. The typical collector-emitter voltage is 40V and the power off current is 0.25mA. It also has a maximum output current of 20mA and a minimum current transfer ratio of 500%.

The working principle of the TLP2168(F) is based on the on-off behavior of the LED and phototransistor. When the LED is turned on, the phototransistor conducts and its collector current rises. This collector current can then be amplified, switched and adjusted with different logic circuits or used as a control input for analog circuits. To achieve a maximum signal noise immunity of the TLP2168(F), the LED is operated in the linear mode, at a constant current of 50mA.

The TLP2168(F) opto-isolator is used in a variety of applications, ranging from industrial to consumer electronic devices. It can be used to provide isolation between different logic circuits, and for signal level conversion between logic and analog signals. It is also ideal for RS-232, RS-485, micro-controller, digital audio, and video systems. In automotive applications, the optocoupler is used to isolate the signals from the engine control computer and prevent electrical and mechanical shocks from damaging the ECU.

The TLP2168(F) is an ideal opto-isolator for a variety of applications requiring the use of logic level output. It has a 5kVrms maximum breakdown voltage, a 10Vac minimum isolation voltage, and an expected power dissipation of 540mW. The LED operates at a constant current of 50mA and the device has a maximum output current of 20mA and a minimum current transfer ratio of 500%. The device is ideal for providing voltage isolation and logic signal level conversion between digital and analog systems, as well as providing signal noise immunity and ground-loop elimination.

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